A Treatise on Meteorological Instruments - Negretti & Zambra Seven Day Razor Set Wales and Ireland from the

Wales and Ireland from the time of the earliest domestic instruments up to 1900

but this seemingly simple conundrum must have been too enticing to pass up

The case comes with a working lock and key and has a brass inlaid cartouche to the top on which the owner’s name

The dome top of the case is mimicked within the scale plate by a separate domed piece of glass

A Treatise on Meteorological Instruments - Negretti & Zambra Seven Day Razor Set Wales and Ireland from theThis treatise on meteorological instruments was first published in 1864 by the partnership of Henry Negretti and Joseph Zambra, meteorological instrument makers to Queen Victoria, and describes the method of construction, scientific principles and practical uses of barometers, thermometers, hygrometers, rain gauges, anemometers, electrometers, ozonometers and other meteorological instruments. The instruments are fully described, with the help of